/*
    Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file

    This file is part of 0MQ.

    0MQ is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    0MQ is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef __TESTUTIL_HPP_INCLUDED__
#define __TESTUTIL_HPP_INCLUDED__

#include <zmq.h>
#include <zmq_utils.h>

//  This defines the settle time used in tests; raise this if we
//  get test failures on slower systems due to binds/connects not
//  settled. Tested to work reliably at 1 msec on a fast PC.
#define SETTLE_TIME 10         //  In msec

#undef NDEBUG
#include <time.h>
#include <assert.h>
#include <stdarg.h>
#include <string>

#if defined _WIN32
#   if defined _MSC_VER
#       include <crtdbg.h>
#       pragma warning(disable:4996)
#   endif
#else
#   include <unistd.h>
#   include <signal.h>
#   include <stdlib.h>
#   include <sys/wait.h>
#endif

//  Bounce a message from client to server and back
//  For REQ/REP or DEALER/DEALER pairs only

void
bounce (void *server, void *client)
{
    const char *content = "12345678ABCDEFGH12345678abcdefgh";

    //  Send message from client to server
    int rc = zmq_send (client, content, 32, ZMQ_SNDMORE);
    assert (rc == 32);
    rc = zmq_send (client, content, 32, 0);
    assert (rc == 32);

    //  Receive message at server side
    char buffer [32];
    rc = zmq_recv (server, buffer, 32, 0);
    assert (rc == 32);
    //  Check that message is still the same
    assert (memcmp (buffer, content, 32) == 0);
    int rcvmore;
    size_t sz = sizeof (rcvmore);
    rc = zmq_getsockopt (server, ZMQ_RCVMORE, &rcvmore, &sz);
    assert (rc == 0);
    assert (rcvmore);
    rc = zmq_recv (server, buffer, 32, 0);
    assert (rc == 32);
    //  Check that message is still the same
    assert (memcmp (buffer, content, 32) == 0);
    rc = zmq_getsockopt (server, ZMQ_RCVMORE, &rcvmore, &sz);
    assert (rc == 0);
    assert (!rcvmore);
    
    //  Send two parts back to client
    rc = zmq_send (server, buffer, 32, ZMQ_SNDMORE);
    assert (rc == 32);
    rc = zmq_send (server, buffer, 32, 0);
    assert (rc == 32);

    //  Receive the two parts at the client side
    rc = zmq_recv (client, buffer, 32, 0);
    assert (rc == 32);
    //  Check that message is still the same
    assert (memcmp (buffer, content, 32) == 0);
    rc = zmq_getsockopt (client, ZMQ_RCVMORE, &rcvmore, &sz);
    assert (rc == 0);
    assert (rcvmore);
    rc = zmq_recv (client, buffer, 32, 0);
    assert (rc == 32);
    //  Check that message is still the same
    assert (memcmp (buffer, content, 32) == 0);
    rc = zmq_getsockopt (client, ZMQ_RCVMORE, &rcvmore, &sz);
    assert (rc == 0);
    assert (!rcvmore);
}

//  Same as bounce, but expect messages to never arrive
//  for security or subscriber reasons.

void
expect_bounce_fail (void *server, void *client)
{
    const char *content = "12345678ABCDEFGH12345678abcdefgh";
    char buffer [32];

    //  Send message from client to server
    int rc = zmq_send (client, content, 32, ZMQ_SNDMORE);
    assert (rc == 32);
    rc = zmq_send (client, content, 32, 0);
    assert (rc == 32);

    //  Receive message at server side (should not succeed)
    int timeout = 150;
    rc = zmq_setsockopt (server, ZMQ_RCVTIMEO, &timeout, sizeof (int));
    assert (rc == 0);
    rc = zmq_recv (server, buffer, 32, 0);
    assert (rc == -1);
    assert (zmq_errno () == EAGAIN);

    //  Send message from server to client to test other direction
    rc = zmq_send (server, content, 32, ZMQ_SNDMORE);
    assert (rc == 32);
    rc = zmq_send (server, content, 32, 0);
    assert (rc == 32);

    //  Receive message at client side (should not succeed)
    rc = zmq_setsockopt (client, ZMQ_RCVTIMEO, &timeout, sizeof (int));
    assert (rc == 0);
    rc = zmq_recv (client, buffer, 32, 0);
    assert (rc == -1);
    assert (zmq_errno () == EAGAIN);
}

//  Receive 0MQ string from socket and convert into C string
//  Caller must free returned string. Returns NULL if the context
//  is being terminated.
char *
s_recv (void *socket) {
    char buffer [256];
    int size = zmq_recv (socket, buffer, 255, 0);
    if (size == -1)
        return NULL;
    if (size > 255)
        size = 255;
    buffer [size] = 0;
    return strdup (buffer);
}

//  Convert C string to 0MQ string and send to socket
int
s_send (void *socket, const char *string) {
    int size = zmq_send (socket, string, strlen (string), 0);
    return size;
}

//  Sends string as 0MQ string, as multipart non-terminal
int
s_sendmore (void *socket, const char *string) {
    int size = zmq_send (socket, string, strlen (string), ZMQ_SNDMORE);
    return size;
}

#define streq(s1,s2)    (!strcmp ((s1), (s2)))
#define strneq(s1,s2)   (strcmp ((s1), (s2)))

const char *SEQ_END = (const char *) 1;

//  Sends a message composed of frames that are C strings or null frames.
//  The list must be terminated by SEQ_END.
//  Example: s_send_seq (req, "ABC", 0, "DEF", SEQ_END);
void s_send_seq (void *socket, ...)
{
    va_list ap;
    va_start (ap, socket);
    const char * data = va_arg (ap, const char *);
    while (true)
    {
        const char * prev = data;
        data = va_arg (ap, const char *);
        bool end = data == SEQ_END;

        if (!prev) {
            int rc = zmq_send (socket, 0, 0, end ? 0 : ZMQ_SNDMORE);
            assert (rc != -1);
        }
        else {
            int rc = zmq_send (socket, prev, strlen (prev)+1, end ? 0 : ZMQ_SNDMORE);
            assert (rc != -1);
        }
        if (end)
            break;
    }
    va_end (ap);
}

//  Receives message a number of frames long and checks that the frames have
//  the given data which can be either C strings or 0 for a null frame.
//  The list must be terminated by SEQ_END.
//  Example: s_recv_seq (rep, "ABC", 0, "DEF", SEQ_END);
void s_recv_seq (void *socket, ...)
{
    zmq_msg_t msg;
    zmq_msg_init (&msg);

    int more;
    size_t more_size = sizeof(more);

    va_list ap;
    va_start (ap, socket);
    const char * data = va_arg (ap, const char *);
    
    while (true) {
        int rc = zmq_msg_recv (&msg, socket, 0);
        assert (rc != -1);

        if (!data)
            assert (zmq_msg_size (&msg) == 0);
        else
            assert (strcmp (data, (const char *)zmq_msg_data (&msg)) == 0);

        data = va_arg (ap, const char *);
        bool end = data == SEQ_END;

        rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size);
        assert (rc == 0);

        assert (!more == end);
        if (end)
            break;
    }
    va_end (ap);

    zmq_msg_close (&msg);
}


// Sets a zero linger period on a socket and closes it.
void close_zero_linger (void *socket)
{
    int linger = 0;
    int rc = zmq_setsockopt (socket, ZMQ_LINGER, &linger, sizeof(linger));
    assert (rc == 0 || errno == ETERM);
    rc = zmq_close (socket);
    assert (rc == 0);
}

void setup_test_environment()
{
#if defined _WIN32
#   if defined _MSC_VER
    _set_abort_behavior( 0, _WRITE_ABORT_MSG);
    _CrtSetReportMode( _CRT_ASSERT, _CRTDBG_MODE_FILE );
    _CrtSetReportFile( _CRT_ASSERT, _CRTDBG_FILE_STDERR );
#   endif
#endif
}

//  Provide portable millisecond sleep
// http://www.cplusplus.com/forum/unices/60161/    http://en.cppreference.com/w/cpp/thread/sleep_for
void msleep (int milliseconds)
{
#ifdef ZMQ_HAVE_WINDOWS
    Sleep (milliseconds);
#else
    usleep (static_cast <useconds_t> (milliseconds) * 1000);
#endif
}


#endif
